About circle carousel (in widget) and size images

Hi! I using an new wordpress theme and i set the widget in top of page. But in tests with core web vitals, the system suggest the reduces the size of the images.

In all stories its using an 640×640 size for each image (each circle), and i set the configs in 120 pixels. How i can set this and improve the performance ?

Im using jetpack (with photon), with custom sidebar plugin.

Another test, im using the AMP Plugin, with Twenty Sixteen plugin in “reader mode” (for layout), and set the widget in top of page (like the Instagram stories).

Thanks in Advanced!

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